Question

Aflati x apartine N pentru care 2x+3 divide 6x+ 44

Answer 1

2x+3 | 2x+3 => 2x+3 | 3(2x+3) <=> 2x+3 | 6x+9
Cum 2x+3 | 6x+9 si 2x+3 | 6x+44 => 2x+3 | (6x+44)-(6x+9) <=> 2x+3 | 37 => 2x+3 ∈ $D_{37}$ ={1 ; 37}
2x+3 =1
2x=-2
x=-1 ∉ N

2x+3=37
2x=34
x=17- solutie

Answer 2

2X+3 / 6X+4
2X+6X=-4-3
8X=-7
X=0.8